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Definitions of Types of Solids

Illustrated · 1 min

By Matthew
Outline of a pyramid with a four-sided base: a point above the base, with the hidden back base edges drawn in gray.

Pyramid- A 3 dimensional shape with one base made from a polygon, with the base's shape included in the name

ex. rectangular pyramid

Outline of a cone: a point at the top over a round base, with the hidden back edge of the base dashed.

Cone- A 3 dimensional shape with one base made from a circle

3D outline of a triangular prism: solid lines show visible edges and dashed lines show hidden edges.

Prism- A 3 dimensional shape with two bases made from congruent polygons, with the bases' shape included in the name

ex. rectangular prism

Cylinder with a dashed vertical line marked h for height and a radius marked r across the bottom base.

Cylinder- A 3 dimensional shape with two bases made from circles

Translucent blue sphere with a shaded flat circle across its middle; a radius r runs from the center to the edge, and another radius points up to the top.

Sphere- a 3 dimensional shape made of all points equidistant from the center of the shape

Five labeled polyhedra: dodecahedron (blue-gray), octahedron (red), tetrahedron (green), icosahedron (purple), and cube or hexahedron (yellow).

Polyhedron- 3 dimensional shape with all sides congruent polygons

A blue tetrahedron: a triangular pyramid with four triangular faces.

Tetrahedron- 4 sided polyhedron made of 4 equilateral triangles

A solid cube in 3D perspective, with its visible faces shaded in green and olive or brown tones.

Hexahedron- 6 sided polyhedron made of 6 squares

An octahedron with colored triangular faces, red, green, yellow and blue, in a diamond outline with points at the top and bottom.

Octahedron- 8 sided polyhedron made of 8 equilateral triangles

Wireframe dodecahedron: black edges outline its 12 pentagonal faces on a white background.

Dodecahedron- 12 sided polyhedron made of 12 regular pentagons

Wireframe icosahedron: solid lines outline the front triangles, dashed lines show the back, with points at the top and bottom.

Icosahedron- 20 sided polyhedron made from 20 equilateral triangles

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